/**
                             * Collection utilities beyond what is provided in the YUI core
                             * @module collection
                             * @submodule arraylist-filter
                             * @deprecated Use ModelList or a custom subclass implementation
                             */
                            
                            /*
                             * Adds filter method to ArrayList prototype
                             */
                            Y.mix(Y.ArrayList.prototype, {
                            
                                /**
                                 * <p>Create a new ArrayList (or augmenting class instance) from a subset
                                 * of items as determined by the boolean function passed as the
                                 * argument.  The original ArrayList is unchanged.</p>
                                 *
                                 * <p>The validator signature is <code>validator( item )</code>.</p>
                                 *
                                 * @method filter
                                 * @param { Function } validator Boolean function to determine in or out.
                                 * @return { ArrayList } New instance based on who passed the validator.
                                 * @for ArrayList
                                 * @deprecated Use ModelList or a custom subclass implementation
                                 */
                                filter: function(validator) {
                                    var items = [];
                            
                                    Y.Array.each(this._items, function(item, i) {
                                        item = this.item(i);
                            
                                        if (validator(item)) {
                                            items.push(item);
                                        }
                                    }, this);
                            
                                    return new this.constructor(items);
                                }
                            
                            });